GY-63_MS5611/libraries/MCP23017_RT/MCP23017.h
2024-01-05 10:59:57 +01:00

108 lines
2.5 KiB
C++

#pragma once
//
// FILE: MCP23017.h
// AUTHOR: Rob Tillaart
// VERSION: 0.6.1
// PURPOSE: Arduino library for I2C MCP23017 16 channel port expander
// DATE: 2019-10-12
// URL: https://github.com/RobTillaart/MCP23017_RT
//
// WARNING: please read REV D note in readme.md.
#include "Arduino.h"
#include "Wire.h"
#define MCP23017_LIB_VERSION (F("0.6.1"))
#define MCP23017_OK 0x00
#define MCP23017_PIN_ERROR 0x81
#define MCP23017_I2C_ERROR 0x82
#define MCP23017_VALUE_ERROR 0x83
#define MCP23017_PORT_ERROR 0x84
#define MCP23017_INVALID_READ -100
class MCP23017
{
public:
MCP23017(uint8_t address, TwoWire *wire = &Wire);
bool begin();
bool isConnected();
uint8_t getAddress();
// single pin interface
// mode = INPUT, OUTPUT or INPUT_PULLUP (==INPUT)
bool pinMode1(uint8_t pin, uint8_t mode);
bool write1(uint8_t pin, uint8_t value);
uint8_t read1(uint8_t pin);
bool setPolarity(uint8_t pin, bool reversed);
bool getPolarity(uint8_t pin, bool &reversed);
bool setPullup(uint8_t pin, bool pullup);
bool getPullup(uint8_t pin, bool &pullup);
// 8 pins interface
// port = 0..1
// value = bit pattern
bool pinMode8(uint8_t port, uint8_t value);
bool write8(uint8_t port, uint8_t value);
int read8(uint8_t port);
bool setPolarity8(uint8_t port, uint8_t mask);
bool getPolarity8(uint8_t port, uint8_t &mask);
bool setPullup8(uint8_t port, uint8_t mask);
bool getPullup8(uint8_t port, uint8_t &mask);
// 16 pins interface
// value = bit pattern
bool pinMode16(uint16_t value);
bool write16(uint16_t value);
uint16_t read16();
bool setPolarity16(uint16_t mask);
bool getPolarity16(uint16_t &mask);
bool setPullup16(uint16_t mask);
bool getPullup16(uint16_t &mask);
int lastError();
protected:
bool writeReg(uint8_t reg, uint8_t value);
uint8_t readReg(uint8_t reg);
uint8_t _address;
TwoWire* _wire;
uint8_t _error;
};
/*
TODO
- can it protect the user
- can we detect REV D chips (over I2C)
class MCP23017_REVD : public MCP23017
{
public:
MCP23017_REVD(uint8_t address, TwoWire *wire = &Wire);
- GPA7 and GPB7 should be set to output in constructor
- GPA7 and GPB7 output mode may not change in any call
- GPA7 and GPB7 should return last written value for read.
- which functions are affected? setMode pullups etc.
};
*/
// -- END OF FILE --